Two Cases of Sudden Death Following Avian Polyomavirus Infection in Imported Psittacine Birds

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  • 輸入インコ類にみられた鳥ポリオーマウイルス感染症による突然死
  • ユニュウ インコルイ ニ ミラレタ トリ ポリオーマウイルス カンセンショウ ニ ヨル トツゼンシ

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Abstract

Two psittacine birds, a Sun conure (Aratinga solstitialis) and an Indian ring-necked parakeet (Psittacula krameri manillensis) imported in 2007 and 2008, respectively, died suddenly at a pet shop in the suburbs of Sapporo, Hokkaido, Japan. In necropsy, both dead birds showed similar macroscopic lesions, with hemorrhaging in subcutaneous tissue and in several internal organs, such as the heart, lung, liver, spleen and small intestine. Histopathologically, multifocal hemorrhagic necrosis lesions were found in the liver. Typical basophilic intranuclear inclusions were formed within the Kupffer cells in the liver and within the MSP cells in the spleen. In the PCR method, polyomaviral DNA were detected from the livers, spleens and intestines of both birds. Therefore, the cases were diagnosed as avian polyomavirus infection. It was suggested that viral infection occurred before their arrival at the pet shop, given the incubation period of this disease and the clinical condition of other birds housed in the same facility.

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